Permanent magnet linear voice coil motor with high thrust-weight ratio for direct drive valve

Abstract

The invention relates to a permanent magnet linear voice coil motor with high thrust-weight ratio for a direct drive valve, comprising an inner stator, an outer stator, a magnetic steel component, a moving coil winding, a moving coil support and an end cover. The permanent magnet linear voice coil motor is characterized in that the magnetic steel component is two circular magnetic steel components which are bonded on the inner wall of the outer stator by a high-strength adhesive; the inner and the outer stators are both bonded on the end cover by adopting the high-strength adhesive; a spigot is processed on the end cover for realizing the mechanical positioning of the inner and the outer stators with the end cover; two annular air gaps are formed between the inner and the outer stators and the two annular magnetic steel components; the moving coil winding adopts two sets of windings, the numbers of turns of the two sets of windings are equivalent, and the winding directions are opposite, each set of winding is respectively arranged in the two annular air gaps constituted by the inner and the outer stators and the two annular magnetic steel components; the moving coil winding adopts a copper clad aluminum enameled wire, the wire winding method of the moving coil winding adopts the multi-layer flat winding; the moving coil support adopts a nylon rod with light weight, high strength and high temperature resistance; and a through hole is formed on the end cover.

Description

technical field [0001] The invention belongs to the technical field of linear motors, in particular to a permanent magnet linear voice coil motor with high thrust-to-weight ratio for directly driving valves. Background technique [0002] A voice coil motor (Voice Coil Motor, VCM) is a kind of moving coil linear DC motor, which is a direct drive motor manufactured according to the principle of Lorentz force. That is, the energized coil will be stressed in the magnetic field, and the magnitude of the force is proportional to the magnitude of the current passing through the coil. In addition to avoiding the gaps in the transmission link of the rotary motor drive like other linear motors, it has theoretically infinite resolution, no lag, high response, high acceleration, high speed, small size, good force characteristics, and convenient control. And other advantages, it is more suitable for motion systems that require high acceleration, high frequency excitation, fast and high ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the unreasonable design of the magnetic circuit of the traditional structure of the voice coil motor, the performance of the permanent magnet is not fully utilized, and the moving coil generates a lot of heat and heat dissipation is difficult, which makes the designed voice coil motor large in size and small in output. Meet the requirements of high-response, high-flow electro-hydraulic servo valve spool drive

Images